I decided to type "endangered snakes" into Google not expecting there to be any, but there are four snakes that are currently endangered.
1) The San Francisco Garter Snake (picture 1)
2) Eastern Indigo Snake (picture 2)
3) The King Cobra (picture 3)
4) Dumeril's Boa (picture 4)
Snakes are not evil creatures. Most snakes will slither away when a human approaches. Some will provide a warning sign, for example a rattlesnake will shake its rattle when someone is near. Don't kill these creatures because you think it may be harmful. Leave the snake alone and it will leave you alone. Also take time to edcuate yourself on snakes because it may come in handy.